Functioning or operation of Evaporative cooling system Project 2022

Functioning or operation of Evaporative cooling system:
Figure.1. Block Diagram of evaporated cooling system.
Evaporative cooling is a technique for the purpose of cooling the air by using the phenomena of
temperature drop. This temperature drop occurs at the time, when the water gets vaporize, which
produces by the moving air.
(Amoodi, Kumar & Hasan 2015)
The principle of evaporative cooling is that the water transfers into the heat for the purpose of
liquid to vapor conversion.
(Maurya, Shrivastav & Shrivastava 2014)
When the evaporation process will start, the heat energy from the remaining water will be at the
liquid position, which provides the result as cool liquid. The cooling tower is being used for the
discharging purpose to the warm air by cooling the water so it also named as the heat rejection
device.

PART (a)
Block diagram of the proposed control system incorporating speed reference from a RTU
with 4-20mA output.
Figure.2. Generating unit Block diagram with master control Relay.
Equipment specifications and their operation:
Temperature Monitoring Device (T.M.D):
For the purpose of serial communication with the computer for controlling the process, A
temperature monitor based microprocessor is being operated in given construction. This device is
being operated for required input numbers processing from the type PT 100 RTDs. For the
purpose of RTD’s installation in the generator and turbine, decentralized inputs are being
connected with the system.
Vibration Monitoring Device (VMD):

VMD is able to communicate with computer by serial interface technique for the purpose of
process control. It is a microprocessor based device equipped with 6 channels for the purpose of
monitor the detector, which specification is being provided by the turbine.
SMD or Speed Monitoring Device:
This device is being specified for the installation purpose of turbine parameters. The sensor of
this system is being mounted at the shaft of generator for providing the output valued as 4 to
20ma.
ASC or Automatic Synchronizing component:
The Automatic synchronization is being made by using the automatic synchronizer unit. The unit
of synchronizing check relay is being provided in the system.
EMT or Electrical measurement transducers:
The EMT are used in various function measurement such as: cosØ, MVar, HZ,3 phase current
and MVarh.
Digital status and Alarm inputs:
The system controller should be able to connect the sixty contact inputs which show the status
and alarm. The controller input modules should be strippable. So that it can allow any contact
input for shutting down the hardware and for stopping the relay.
DC analog inputs:
The system controller should have the ability to accept the analog signals such as: 0-5v, 1-5v
DC, 0-1ma, and 4-20ma analog signals. And it might also be possible to measure Dc signal for
the value of 5V as common mode signals and the differential inputs.
AC current inputs:
The accurate value of AC current input at 0-6.25 amp should be provided to the controller.it
should have the continuous signal value at 10 amp and 50 amp/sec.

AC input Voltage:
The accurate value of AC input voltage at 80-150Vac should be measured by the controller.
Control outputs:
The controller provides the control relay, which is being used in the operation of circuit breakers,
Voltage regulators and other components. The contacts of DPDT must be rated as 125VDC,
0.5A.
RTD Inputs:
The RTD is being connected with the controller and its reading is accurate at the value of
+0.250C.The temperature range should be at 0-1600C. the controller should have 8 number of
inputs for RTD at the different values such as: 10, 100, 120 ohms. And the controller must have
the ability to read the temperature for all RTD’s numbered as 8.
Analog Outputs:
The controller output must be at 4-20ma for the calculation of signal in various forms such as:
Voltage, Current, Power factor, KVar, KW etc. The isolated output signal should have the ability
to perform 1000 common mode voltages. And the output accuracy must be more than 25%.
Alarm outputs (Normal):
The controller should have the ability for controlling the alarm output, which is being generated
internally. The rating for this alarm contact should be at 1 amp on the voltage at 120 VDC.
Electrical Transducers:
The controller should have the ability for deriving the transducer’s components such as:
Generator frequency, Generator power factor, generator Watts, VARS etc. and these transducers
should be connected with the potential and current transformer.